Solliance announced the results of 3,000 hours of testing at the EU PVSEC conference, in Brussels, Belgium. After this thermal stress testing, the cell performance showed still 93 percent of the initial performance.
“Perovskite solar cells have attracted great attention due to their high power conversion efficiency demonstrated stability and scale-ability” said Mehrdad Najafi, researcher at Solliance Solar Research. “These two very important topics within the Solliance collaboration are the next steps towards successful commercialization of this technology. Our recent results show that it is possible to achieve stable perovskite solar cells upon prolonged exposure to thermal stress. After a further full-stack optimisation and the introduction of a metal oxide layer by means of Atomic Layer Deposition (ALD), the thermal stability improved drastically compared with our previous reference: instead of losing over 50 percent of its performance after 100 hours at 85ºC, we now demonstrate only 7 percent of performance loss after 3,000 hours at 85ºC. This is an important stepping stone towards full IEC compliance”.
Adriana Creatore, Associate Professor at the Applied Physics department of the Eindhoven University of Technology (TU/e), partner in Solliance Solar Research, added that in the past 3 years the university has been working with TNO towards the improvement in efficiency and stability of the hybrid perovskite PV technology. The fundamental research on interface engineering between atomic layer deposited (ALD) metal oxide- base charge transport layers and perovskite absorber, has contributed to advancements in this PV technology.
The perovskite solar cell used in the test recalls the structure of the semi-transparent perovskite solar cell Solliance used for its 26.3 percent hybrid perovskite/crystalline silicon tandem solar cell announced by the company, ECN part of TNO and Choshu Industry Co. Ltd announced earlier this year. Solliance is now working to apply pilot scale process equipment provided by its partners to bring this perovskite solar cell to a viable industrial production process for perovskite solar modules.